Sulfur–nitrogen co-doped graphene supported cobalt–nickel sulfide rGO@SN-CoNi_(2)S_(4) as highly efficient bifunctional catalysts for hydrogen/oxygen evolution reactions  

作　　者：Bing-Lu Deng Li-Ping Guo Yuan Lu Hai-Bo Rong Dong-Chu Cheng 

机构地区：[1]School of Materials Science and Hydrogen Energy,Foshan University,Foshan 528000,China [2]Guangdong Key Laboratory for Hydrogen Energy Technologies,Foshan 528000,China [3]School of Environment and Energy,South China University of Technology,Guangzhou 510006,China

出　　处：《Rare Metals》2022年第3期911-920,共10页稀有金属（英文版）

基　　金：financially supported by Guangdong Basic and Applied Basic Research Foundation (Nos. 2020A1515110473 and 2019A1515110528)。

摘　　要：Designing highly active and stable electrocata-lysts for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)is a challenge for energy con-version and storage technology.In this work,a S and N co-doped graphene supported cobalt–nickel sulfide composite catalyst(rGO@SN-CoNi_(2)S_(4))was synthesized simply via a one-step hydrothermal method.The as-synthesized CoNi_(2)S_(4)particles grew in a mosaic manner inside GO lamellae and were encapsulated with graphene.As a bifunctional catalyst,the r GO@SN-CoNi_(2)S_(4)exhibits excellent electrocatalytic performance under alkaline con-ditions,which only required the overpotential of 142.6 mV(vs.RHE)and 310 m V(vs.RHE)to deliver a current density of 10 mA·cm^(-2) for HER and OER,respectively.The good hydrophilicity of the r GO@SN,the pure phase of bimetallic structure,and the chemical coupling/interaction between the CoNi_(2)S_(4)and the rGO@SN are attributable to be the possible reasons responsible for the higher HER and OER catalytic activities.Additionally,the rGO@SN-CoNi_(2)S_(4)also shows a great potential for serving as an excellent cathode and anode electrolyzer during the water splitting process.

关 键 词：Hydrogen evolution reaction Oxygen evolution reaction S and N co-doped grapheme Cobalt–nickel sulfide Water splitting 

分 类 号：TQ116.2[化学工程—无机化工] TQ426